Analog Devices Inc./Maxim Integrated 73S8014R-ILR/F2

Overview

The 73S8014R-ILR/F2 from Teridian Semiconductor is a single smart card (ICC) interface IC designed for ISO/IEC 7816-3 and EMV 4.0 compliant applications. It provides 3V/5V card voltage selection via LDO regulation, supports up to 65mA card current, delivers card clock up to 20MHz, and features true over-current detection (130mA max), all in a 20-pin SO package optimized for Set-Top Box conditional access systems.

For engineers reviewing the 73S8014R-ILR/F2 datasheet, 73S8014R-ILR/F2 pinout, 73S8014R-ILR/F2 application, or 73S8014R-ILR/F2 equivalent, key selection considerations include its firmware compatibility with 8024-type devices, VDD fault threshold adjustability via VDDF_ADJ, integrated activation/deactivation sequencer, and 6kV ESD protection on card I/O pins.

Technical Context

The 73S8014R-ILR/F2 implements an ISO 7816-3-compliant activation/deactivation sequencer controlled by CMDVCC, RSTIN, and 5V/#V inputs, with automated deactivation triggered by VDD undervoltage, VCC overcurrent (true current sensing), or card extraction. Its embedded LDO regulator accepts 4.75–5.5V on VPC and outputs regulated 3V or 5V on VCC, while digital logic operates from a separate 2.7–5.5V VDD supply.

Card clock generation supports either an external crystal (XTALIN/XTALOUT) or host-supplied clock up to 27MHz, with programmable division (÷2, ÷4, ÷8) via CLKDIV1/CLKDIV2 to achieve up to 20MHz CLK output. The OFF interrupt pin provides open-drain fault reporting-including card presence, VDD fault, and overcurrent-with internal 20kΩ pull-up to VDD.

Key Specifications

Pinout & Package

Package: 20-pin SO (Small Outline Plastic), RoHS-compliant (6/6), 0.300-inch body width, JEDEC MS-013AC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart card interface applications.

Compared with 73S8024RN-ILR/F2, the 73S8014R-ILR/F2 reduces pin count and system cost while retaining core ISO/EMV functionality; compared with SLC1000-200, it adds critical VDD threshold tuning and true over-current protection essential for certified payment and STB deployments.

Availability

The 73S8014R-ILR/F2 is available at Aetrix Electronics and suitable for Set-Top Box conditional access, EMV-certified payment terminals, and general-purpose smart card readers requiring stable component supply across extended product lifecycles.

Supply support for 73S8014R-ILR/F2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Teridian Semiconductor Corporation was a fabless analog/mixed-signal IC designer specializing in metering, power management, and secure interface solutions before its acquisition by Maxim Integrated in 2010.

The 73S80xxR family-including the 73S8014R-ILR/F2-was engineered specifically for cost-sensitive, high-reliability smart card interfacing in consumer and industrial equipment, emphasizing EMV/ISO compliance, low external component count, and robust fault handling.

FAQ

What is the primary function of the 73S8014R-ILR/F2 in a smart card system?

The 73S8014R-ILR/F2 serves as a dedicated ISO/IEC 7816-3 and EMV 4.0 compliant smart card interface IC. It manages card power (3V/5V via internal LDO), generates and controls the card clock (up to 20MHz), sequences activation/deactivation, and handles bidirectional data I/O-all while providing fault detection and reporting. Its role is to offload low-level card interface timing and electrical compliance from the host processor, ensuring interoperability with standard smart cards.

Does the 73S8014R-ILR/F2 support both 3V and 5V smart cards?

Yes, the 73S8014R-ILR/F2 supports both 3V and 5V smart cards. Voltage selection is controlled by the logic level on the 5V/#V pin (Pin 7): high selects 5V operation, low selects 3V. The internal LDO regulator delivers the selected voltage to VCC with tight regulation (±5% at 65mA load), meeting EMV 4.0 requirements for both voltage classes. The 73S8014R-ILR/F2 also supports 1.8V cards under pulsed load conditions per datasheet Table 5.

How does the VDDF_ADJ pin affect system behavior in the 73S8014R-ILR/F2?

The VDDF_ADJ pin (Pin 12) allows customization of the VDD undervoltage fault threshold that triggers automatic card deactivation. By default, the threshold is 2.4V; connecting an external resistor network adjusts it to match the host MCU's brown-out detection level (e.g., 2.7V). This ensures coordinated shutdown: when the host loses power, the 73S8014R-ILR/F2 deactivates the card before VDD drops below the MCU's operational minimum, preventing data corruption or card lock-up.

What distinguishes the over-current protection in the 73S8014R-ILR/F2 from conventional implementations?

Unlike many 8024-compatible ICs that infer over-current from VCC voltage droop, the 73S8014R-ILR/F2 uses true hardware current sensing with a 130mA trip threshold. This provides accurate, fast, and load-independent fault detection-even under dynamic card current profiles-and avoids false triggers caused by PCB trace resistance or capacitor ESR. The result is more reliable card deactivation during insertion transients or short circuits, directly enhancing system robustness in real-world deployments.

Can the 73S8014R-ILR/F2 be used with an external clock source instead of a crystal?

Yes, the 73S8014R-ILR/F2 supports both crystal oscillator (via XTALIN/XTALOUT pins) and external clock input (applied to XTALIN only). The maximum input frequency is 27MHz, and the internal divider (CLKDIV1/CLKDIV2) scales it down to produce the required card clock (≤20MHz). When using an external clock, XTALOUT must be left unconnected and crystal-loading capacitors (C2/C3) omitted. This flexibility simplifies layout and reduces BOM cost in systems with available master clocks.